* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  list-style: none;
  text-decoration: none;
}

body {
  /* width为视口宽度单位，height为视口高度 */
  width: 100vw;
  height: 100vh;
}
.header {
  display: flex;
  width: 100%;
  height: 48px;
  padding: 20px 40px 0 40px;
  margin: 0 auto;
  justify-content: space-between;
  align-items: center;
  position: relative;
}
.header > .left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header > .right {
  width: 300px;
}
.header > .right ul {
  display: flex;
  align-items: center;
}
.header > .right ul li img + a {
  margin-left: 10px;
}
.header > .right ul li img + a::after {
  content: "";
  position: absolute;
  display: inline-block;
  right: 0;
  top: 50%;
  width: 1px;
  height: 16px;
  /* background: #c8c8c8; */
  transform: translateY(-50%);
  background-color: black;
  border-radius: 1px;
}
.header > .right ul li {
  position: relative;
  padding-right: 20px;
  padding-left: 10px;
}
.sidebar {
  position: fixed;
  top: 68px;
  left: 0;
  width: 200px;
  border-radius: 10px;
  border: 1px solid #c8c8c8;
}
.sidebar > div > ul {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-around;
  height: 680px;
  color: #fff;
  font-size: 24px;
  font-weight: bold;
  padding: 20px;
}
.sidebar > div > ul > li > span {
  color: #c8c8c8;
  font-size: 14px;
  font-weight: normal;
  margin-top: 10px;
}
